Despite the democratised access to digital media, there are still gaps in uses and opportunities according to age, sex, socioeconomic level, and location. In addition, the study about the use of digital media by children and adolescents has focused more on the risks than on the opportunities. This study analyses the relationship between different uses of digital media (socialisation, socio-political, and learning purposes), with school civic engagement. A sample of 524 students (M[subscript age]=12; 43.7% girls) from Santiago de Chile participated. Structural equation modelling with latent variables was used to test a parallel mediation model in which the use of socialisation in digital media is related to school civic engagement, through digital media use for socio political purposes and the digital media use for learning purposes. In addition, multigroup analysis by sex was tested. The main results showed that digital media use for socialisation has a positive effect on school civic engagement through the parallel mediation of digital media use for socio-political purposes and the digital media use for learning purposes. The multigroup analysis showed that mediation is significant in both boys and girls. The results have contributed to the expansion of knowledge about the opportunities of digital media on civic engagement in formal school contexts.